title: The effects of long meditation on plasma melatonin and blood serotonin.
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D019122:Meditation; D008550:Melatonin / Q000097:blood*; D008875:Middle Aged; D018377:Neurotransmitter Agents / Q000378:metabolism*; D012063:Relaxation; D012064:Relaxation Therapy; D012146:Rest; D012701:Serotonin / Q000097:blood*; D013997:Time Factors
chemical_list: D018377:Neurotransmitter Agents; D012701:Serotonin; D008550:Melatonin